Elevated Levels of MMP12 Sourced from Macrophages Are Associated with Poor Prognosis in Urothelial Bladder Cancer
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Background: Urothelial bladder cancer is most frequently diagnosed at the non-muscle-invasive stage (NMIBC). However, recurrences and interventions for intermediate and high-risk NMIBC patients impact the quality of life. Biomarkers for patient stratification could help to avoid unnecessary interventions whilst indicating aggressive measures when required.
Methods: In this study, immuno-oncology focused, multiplexed proximity extension assays were utilised to analyse plasma (n = 90) and urine (n = 40) samples from 90 newly-diagnosed and treatment-naïve bladder cancer patients. Public single-cell RNA-sequencing and microarray data from patient tumour tissues and murine OH-BBN-induced urothelial carcinomas were also explored to further corroborate the proteomic findings.
Results: Plasma from muscle-invasive, urothelial bladder cancer patients displayed higher levels of MMP7 (p = 0.028) and CCL23 (p = 0.03) compared to NMIBC patients, whereas urine displayed higher levels of CD27 (p = 0.044) and CD40 (p = 0.04) in the NMIBC group by two-sided Wilcoxon rank-sum tests. Random forest survival and multivariable regression analyses identified increased MMP12 plasma levels as an independent marker (p < 0.001) associated with shorter overall survival (HR = 1.8, p < 0.001, 95% CI:1.3-2.5); this finding was validated in an independent patient OLINK cohort, but could not be established using a transcriptomic microarray dataset. Single-cell transcriptomics analyses indicated tumour-infiltrating macrophages as a putative source of MMP12.
Conclusions: The measurable levels of tumour-localised, immune-cell-derived MMP12 in blood suggest MMP12 as an important biomarker that could complement histopathology-based risk stratification. As MMP12 stems from infiltrating immune cells rather than the tumor cells themselves, analyses performed on tissue biopsy material risk a biased selection of biomarkers produced by the tumour, while ignoring the surrounding microenvironment.
Yoshihara K, Ito K, Kimura T, Yamamoto Y, Urabe F Bladder Cancer. 2025; 11(1):23523735251322017.
PMID: 40034247 PMC: 11864234. DOI: 10.1177/23523735251322017.
You P, Liu X, Wang M, Zhan Y, Chen L, Chen Y Sci Rep. 2025; 15(1):6618.
PMID: 39994268 PMC: 11850890. DOI: 10.1038/s41598-025-90183-0.
Zhou S, Yang Y, Qi F, Sun W, Zhang D, Lu Z Sci Rep. 2025; 15(1):817.
PMID: 39755752 PMC: 11700112. DOI: 10.1038/s41598-025-85241-6.
Tatsuno R, Komohara Y, Pan C, Kawasaki T, Enomoto A, Jubashi T Cancers (Basel). 2024; 16(16).
PMID: 39199574 PMC: 11353089. DOI: 10.3390/cancers16162801.
Han D, Yu F, Zheng L Epidemiol Health. 2024; 46:e2024046.
PMID: 38697862 PMC: 11417446. DOI: 10.4178/epih.e2024046.